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Date:      Thu, 3 Jun 1999 21:30:32 +0200 (CEST)
From:      Wilko Bulte <wilko@yedi.iaf.nl>
To:        mjacob@feral.com
Cc:        freebsd-scsi@FreeBSD.ORG
Subject:   Re: Fibrechannel
Message-ID:  <199906031930.VAA02758@yedi.iaf.nl>
In-Reply-To: <Pine.BSF.4.05.9906031154110.77206-100000@semuta.feral.com> from Matthew Jacob at "Jun 3, 1999 11:55:20 am"

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As Matthew Jacob wrote ...
> > As Matthew Jacob wrote ...
> > 
> > > What do you mean?
> > 
> > Well, I borrowed an Emulex LP6000 from my employer. I hope to also borrow a
> > couple of FC disks to hook up to it. I know there is no LP6000 driver
> > around in FreeBSD so I'm sort of considering to try to write one. A
> > FC-AL driver that is.
> 
> Ah. Well, let's try and architect one so that IP && SCSI are just one of a
> set of ULPs on top of this. The Qlogic architecture is a bit more
> automatic transmission-like....

The approach you mention is what the FC standards advocate, I think it is a
good thing to layer it. 

Some other things that need thought, esp. on fabrics: how to 'wire down'
a FC device. 

I think something like:

disk            da0     at fcloop 0 wwn=<64bitnumber>
disk		da1	at fabric 1 wwn=<64bitnumber>

Maybe one could even omit the fcloop 0 stuff, as the wwn should be
sufficient, being worldwide unique etc. 

These are currently some first random thoughts..

> > Well, fabrics are a bit on the expensive side. I could probably test it
> > at work but that is quite awkward. I don't have any Qlogic FC cards so
> > I can't really help you testing the fabric functionality.
> 
> Okay.

What is the part# for the Qlogic FC adapter anyway? One never knows...

> > > What were you looking for specifically?
> > 
> > For a start: does anyone have a (soft) copy of the Emulex programming
> > interface manual for me?
> 
> Not I. Sorry.

I'll try to hunt it down.

|   / o / /  _  	 Arnhem, The Netherlands	- Powered by FreeBSD -
|/|/ / / /( (_) Bulte 	 WWW  : http://www.tcja.nl 	http://www.freebsd.org


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